Pipettor for medical examination

Abstract

The invention relates to the technical field of pipettors, and discloses a pipettor for medical examination, which comprises a base, the top surface of the base is fixedly connected with a pipetting end shell, the front side surface of the pipetting end shell is fixedly connected with a control grab handle, a test tube vessel is arranged below the control grab handle, the top end in the pipetting end shell is provided with a pipetting mechanism, and the pipetting mechanism is fixedly connected with the control grab handle. The top of the pipetting mechanism is provided with a maintenance mechanism, the bottom surface of the pipetting mechanism is provided with a container sealing mechanism, the pipetting mechanism comprises a lifting protection plate, the bottom surface of the lifting protection plate is fixedly connected with a bottom frame, the bottom surface of the bottom frame is fixedly connected with two hydraulic rods, and the rear end of the lifting protection plate is fixedly connected with a motor. Automatic filling of liquid in the air cylinder is achieved, an air pressure structure is simplified, flushing of the internal structure after use is facilitated, air is discharged through the liquid conveying cavity and then divided through the branch vertical pipes, liquid suction and liquid relief operation can be conducted on multiple test tubes at the same time, and the working efficiency of liquid suction and liquid relief is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipettes, in particular to a pipette for medical testing. Background Art

[0002] In medical testing, pipettes are key tools for accurate transfer of liquid samples. However, although pipettes are designed to provide high-precision liquid handling, some problems may be encountered during actual use. These problems may lead to errors in experimental results, inaccurate data, and even affect clinical diagnosis or research results. Pipette is a vital tool in medical testing, but its use also needs to follow certain specifications. Problems during use may arise from a variety of reasons, including failure of the equipment itself, improper operation or external environmental influences. To ensure the accuracy of the experiment, the pipette needs to be calibrated regularly, operated correctly and maintained in a timely manner.

[0003] The patent with announcement number CN215087259U discloses a pipette for medical examination, including a base, a main body, a sliding box, an electronic pipette gun, a tray and a reagent bottle, wherein the main body is fixedly mounted on the rear side of the top of the base, the sliding box is fixedly mounted on the top of the main body, the inner cavity of the sliding line is provided with a lifting assembly, several electronic pipette guns are fixedly connected to the bottom of the lifting assembly, the top of the base is provided with a sliding assembly, two trays are placed in the inner cavity of the sliding assembly, and several reagent bottles are plugged into the inner cavity of the tray. The pipette for medical examination solves the problem that the pipette can only transfer liquid in one reagent bottle at a time, and multiple operations are required when transferring a large amount of reagents, which is very time-consuming and affects the progress of reagent testing. However, the patent still has the problem that the internal connecting structure is complicated and inconvenient to rinse, so a pipette for medical examination is proposed to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pipette for medical testing in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pipette for medical testing, comprising a base, a pipette end shell is fixedly connected to the top surface of the base, a control handle is fixedly connected to the front side of the pipette end shell, a test tube vessel is arranged below the control handle, a pipette mechanism is arranged at the top of the inner top of the pipette end shell, a maintenance mechanism is arranged at the top of the pipette mechanism, and a container sealing mechanism is arranged at the bottom surface of the pipette mechanism; The pipetting mechanism includes a lifting guard plate, the bottom surface of the lifting guard plate is fixedly connected to a base frame, the bottom surface of the base frame is fixedly connected to two hydraulic rods, the rear end of the lifting guard plate is fixedly connected to a motor, the end of the motor output shaft is fixedly connected to a threaded rod, the outer surface of the threaded rod is fixedly connected to a peristaltic disk, the outer edge of the peristaltic disk is rotatably connected to a peristaltic wheel, a hose is tightly fitted to the outer side of the peristaltic wheel, one end of the hose is fixedly connected to an output pipe, the end of the hose away from the output pipe is fixedly connected to an input pipe, the end of the threaded rod away from the motor is threadedly connected to a spline rod, and the outer surface of the spline rod is slidably connected to an air cylinder.

[0006] According to the above technical solution, a piston is slidably connected inside the gas cylinder, a drainage pipe is fixedly connected to the front end of the gas cylinder, the bottom end of the drainage pipe is fixedly connected to the infusion cavity, a plurality of branch vertical pipes are fixedly connected to the bottom surface of the infusion cavity, a plurality of branch vertical pipes are fixedly connected to the bottom ends of the branch vertical pipes are fixedly connected to a branch pipe rack, a dropper is fixedly connected to the bottom surface of the branch pipe rack, four auxiliary sliding rods are fixedly connected to the top surface of the branch pipe rack, and a one-way port is fixedly connected to the bottom surface of the gas cylinder.

[0007] According to the above technical scheme, the lifting guard plate is slidably connected to the inner wall of the pipetting end shell, the hose is fixedly connected to the lifting guard plate, the piston is fixedly connected to the spline rod, the air cylinder is fixedly connected to the lifting guard plate, and the auxiliary sliding rod slides through the interior of the pipetting end shell. When working, the built-in hydraulic device is used to control the contraction of the hydraulic rod, so that the base frame connected to the hydraulic rod moves downward and drives the connected lifting guard plate to move downward. At this time, the air cylinder connected to the lifting guard plate moves downward together, and the infusion cavity is driven downward by the drainage pipe connected to the air cylinder, so that the infusion cavity pushes the connected branch vertical pipe to move downward and pushes the dropper connected to the bottom of the branch pipe rack close to the test tube vessel below. When the motor connected to the lifting guard plate drives the threaded rod to rotate through the output shaft, the threaded rod drives the spline rod to slide at the connection between the spline rod and the air cylinder through rotation, and the spline rod pushes the connected piston to slide along the air cylinder, and the liquid in the air cylinder is passed through The liquid is transported to the infusion cavity in one direction through the discharge tube, and then transported to the connected branch vertical tube through the infusion cavity, and then flows into the dropper through the branch vertical tube and discharged into the test tube in the test tube container. Then, the motor flips and drives the threaded rod to rotate. When the piston approaches the direction of the motor, the threaded rod rotates and drives the peristaltic disk to rotate at the same time. After the peristaltic disk rotates, it squeezes the hose through the connected peristaltic wheel, allowing the air in the hose to move and be discharged into the one-way port, and then enters the air cylinder through the one-way port. As the air pressure in the hose decreases, the hose will suck the liquid in the input tube upward, and as the peristaltic disk continues to rotate, the liquid reaching the hose is transported to the air cylinder in one direction through the hose. The threaded rod rotates to drive the piston connected to the spline rod, and the peristaltic disk and the peristaltic wheel cooperate with the hose to drain the liquid into the air cylinder, thereby realizing automatic filling of the liquid in the air cylinder, simplifying the air pressure structure and facilitating flushing of the internal structure after use.

[0008] According to the above technical solution, the maintenance mechanism includes a liquid-passing end tube, the top end of the liquid-passing end tube is fixedly connected to a lubricating tank, the interior of the air cylinder is fixedly connected to a partition baffle, the side of the partition baffle is fixedly connected to a side-pass valve, the top surface of the air cylinder is fixedly connected to a one-way valve, a lubricating cavity is provided on the rear side of the partition baffle, and two lubricating tubes are fixedly connected to the rear side of the air cylinder.

[0009] According to the above technical solution, the lubricating tank is connected to the liquid end pipe, the one-way valve is connected to the air cylinder, the liquid end pipe is fixedly connected to the air cylinder, a return spring is arranged between the piston and the partition baffle, and the two ends of the return spring are respectively fixedly connected to the piston and the partition baffle, the end of the root lubricating pipe away from the air cylinder is connected to the inside of the hydraulic rod, the air cylinder and the root lubricating pipe are connected to each other, when the piston slides through the partition baffle through the connected spline rod, the space between the partition baffle and the piston is compressed, and the return spring between the partition baffle and the piston is squeezed, and the return spring is pressed to Applying pressure to the piston causes the piston to be forced to fit the inner wall of the cylinder, thereby increasing the structural sealing between the cylinder and the piston, and the air between the partition baffle and the piston is discharged into the lubricating chamber through the side-pass valve on the partition baffle. Since the lubricating liquid in the lubricating chamber is discharged into the lubricating chamber in one direction through the liquid-passing end tube, as the amount of air discharged into the lubricating chamber by the side-pass valve increases, the liquid in the lubricating chamber is discharged into the lubricating tube along with part of the air. The hydraulic rod structure or the auxiliary sliding rod is lubricated by the liquid in the lubricating tube, which can reduce the wear between parts and reduce the impact of wear and damage on the normal use of the hydraulic rod on the pipetting.

[0010] According to the above technical solution, the container sealing mechanism includes a rubber rod, the bottom end of the rubber rod is slidably connected to a pressure frame, the end of the pressure frame away from the rubber rod is fixedly connected to a short pressure rod, the outer surface of the short pressure rod is slidably connected to a positioning piece, the bottom end of the short pressure rod is fixedly connected to a sealing cover, a test liquid container is provided at the bottom of the sealing cover, guide blocks are provided on both sides of the top of the test liquid container, and the inner bottom end of the test liquid container is fixedly connected to a connecting end.

[0011] According to the above technical solution, a plug rod is slidably connected inside the connecting end, a connecting seal is provided on the outer side of the rear end of the plug rod, a drainage groove is provided on the outer side of the front end of the plug rod, and a top sheet is provided on the front side of the plug rod.

[0012] According to the above technical solution, the positioning piece is fixedly connected to the inner wall of the pipetting end shell, the sealing cover is slidably connected to the pipetting end shell, an elastic spring is arranged on the outer side of the short pressure rod, and the two ends of the elastic spring are respectively fixedly connected to the positioning piece and the sealing cover, the top piece is fixedly connected to the inner wall of the bottom end of the input tube, a connecting spring is arranged on the outer side of the plug rod, and the two ends of the connecting spring are respectively fixedly connected to the connecting end and the plug rod, when the hydraulic rod contracts, the rubber rod is driven downward by the downward movement of the hydraulic rod, and the pressure on the rubber rod will push the connected pressure frame to slide downward along the connection with the positioning piece through the short pressure rod, so that the short pressure rod pushes the sealing cover downward to approach the test liquid container. The top of the plug rod is pressed and the spring is stretched. When the test liquid container is fully matched with the sealing cover, the sealing cover plays a role in positioning the test liquid container and at the same time, the sealing cover is used to squeeze the test liquid container downward, so that the sealing cover seals the inside of the test liquid container to reduce the influence of the internal test liquid on the external environment. In addition, the connecting end on the test liquid container is docked with the bottom of the input tube, so that the top plate in the input tube squeezes the plug rod, and the plug rod slides along the connection of the connecting end after being pressed and compresses the connecting spring. The movement of the plug rod makes the connecting seal no longer blocked by the connecting end, and the input tube is connected with the inside of the test liquid container. The flexibility of disassembly of the test liquid container can be improved by plugging and connecting.

[0013] The present invention adopts the above technical solution to bring the following beneficial effects: The present invention is provided with a lifting guard plate, a base frame, a hydraulic rod, a motor, a peristaltic disk, a peristaltic wheel, a hose, an output tube, an input tube, a threaded rod, a spline rod, an air cylinder, a piston, a drainage tube, an infusion chamber, a branch vertical pipe, a branch pipe rack, and a dropper. The threaded rod is used to rotate to drive the piston connected to the spline rod, and at the same time, the peristaltic disk and the peristaltic wheel cooperate with the hose to guide the liquid into the air cylinder, so as to realize automatic filling of the liquid in the air cylinder, simplify the air pressure structure to facilitate the flushing of the internal structure after use, and use the infusion chamber to discharge the air and then divert it through the branch vertical pipe, so as to simultaneously perform aspiration and pipetting operations on multiple test tubes, thereby improving the working efficiency of aspiration and pipetting.

[0014] The present invention is provided with a liquid-passing end tube, a partition baffle, a one-way valve, a lubricating tank, a lubricating tube, a side-pass valve, and a lubricating cavity. The liquid in the lubricating tube is used to lubricate the hydraulic rod structure or the auxiliary sliding rod, thereby reducing wear between parts, reducing the impact of wear and damage of the hydraulic rod on normal use of pipetting, thereby increasing the overall service life of the equipment and reducing the trouble of manual maintenance.

[0015] The present invention is provided with a rubber rod, a pressure frame, a short pressure rod, a positioning piece, a sealing cover, a guide plug block, a test liquid container, a connecting end, a plug rod, and a connecting seal. After the plug rod is pressed, it slides along the connecting end and compresses the connecting spring. The plug rod moves so that the connecting seal is no longer blocked by the connecting end, thereby realizing the connection between the input tube and the inside of the test liquid container. Through the plug-in connection method, the disassembly flexibility of the test liquid container can be improved, so as to facilitate the cleaning and use of the test liquid container, and it is more conducive to the complete discharge of liquid in the test liquid container through the input tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall rear-view stereoscopic structure of the present invention; Figure 3 This is a schematic diagram of the structure of the mechanism position distribution of the present invention; Figure 4 It is a schematic diagram of the structure of the liquid transfer mechanism of the present invention; Figure 5 For the present invention Figure 4 A is a schematic diagram of the enlarged structure of the middle part; Figure 6 It is a schematic diagram of the structure of the maintenance mechanism of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of B; Figure 8 This is a schematic diagram of the structure of the container sealing mechanism of the present invention; Fig. 9 It is a schematic diagram of the plug rod connection structure of the present invention.

[0017] In the figure: 1, base; 2, pipetting end shell; 3, control handle; 4, test tube vessel; 5, pipetting mechanism; 51, lifting guard plate; 52, bottom frame; 53, hydraulic rod; 54, motor; 55, peristaltic disc; 56, peristaltic wheel; 57, hose; 58, output pipe; 59, input pipe; 510, threaded rod; 511, spline rod; 512, air cylinder; 513, piston; 514, discharge pipe; 515, infusion chamber; 516, branch vertical pipe; 517, branch pipe rack; 518, dropper; 51 9. Auxiliary slide bar; 520. One-way port; 6. Maintenance mechanism; 61. Liquid end pipe; 62. Partition baffle; 63. One-way valve; 64. Lubricating tank; 65. Lubricating pipe; 66. Side valve; 67. Lubricating cavity; 7. Container sealing mechanism; 71. Rubber rod; 72. Pressure frame; 73. Short pressure rod; 74. Positioning piece; 75. Sealing cover; 76. Guide plug; 77. Test liquid container; 78. Connecting end; 79. Plug rod; 710. Connecting seal; 711. Drain trough; 712. Top piece. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 9 One embodiment of the present invention is: a medical test pipette, comprising a base 1, a pipette end shell 2 is fixedly connected to the top surface of the base 1, a control handle 3 is fixedly connected to the front side of the pipette end shell 2, a test tube container 4 is arranged below the control handle 3, a pipette mechanism 5 is arranged at the top of the inner top of the pipette end shell 2, a maintenance mechanism 6 is arranged on the top of the pipette mechanism 5, and a container sealing mechanism 7 is arranged on the bottom surface of the pipette mechanism 5; The pipetting mechanism 5 includes a lifting guard plate 51, the bottom surface of the lifting guard plate 51 is fixedly connected to a base frame 52, the bottom surface of the base frame 52 is fixedly connected to two hydraulic rods 53, the rear end of the lifting guard plate 51 is fixedly connected to a motor 54, the end of the output shaft of the motor 54 is fixedly connected to a threaded rod 510, the outer surface of the threaded rod 510 is fixedly connected to a peristaltic disk 55, the outer edge of the peristaltic disk 55 is rotatably connected to a peristaltic wheel 56, the outer side of the peristaltic wheel 56 is tightly fitted with a hose 57, one end of the hose 57 is fixedly connected to an output pipe 58, the end of the hose 57 away from the output pipe 58 is fixedly connected to an input pipe 59, the end of the threaded rod 510 away from the motor 54 is threadedly connected to a spline rod 511, and the outer surface of the spline rod 511 is slidably connected to an air cylinder 512.

[0020] The inside of the air cylinder 512 is slidably connected to a piston 513, the front end of the air cylinder 512 is fixedly connected to a drainage pipe 514, the bottom end of the drainage pipe 514 is fixedly connected to an infusion chamber 515, the bottom surface of the infusion chamber 515 is fixedly connected to a plurality of branch vertical pipes 516, the bottom ends of the plurality of branch vertical pipes 516 are fixedly connected to a branch pipe rack 517, the bottom surface of the branch pipe rack 517 is fixedly connected to a dropper 518, the top surface of the branch pipe rack 517 is fixedly connected to four auxiliary sliding rods 519, and the bottom surface of the air cylinder 512 is fixedly connected to a one-way port 520.

[0021] The lifting guard plate 51 is slidably connected to the inner wall of the transfer end shell 2, the hose 57 is fixedly connected to the lifting guard plate 51, the piston 513 is fixedly connected to the spline rod 511, the air cylinder 512 is fixedly connected to the lifting guard plate 51, and the auxiliary slide bar 519 slides through the interior of the transfer end shell 2, and the drainage tube 514 connected to the air cylinder 512 drives the infusion cavity 515 to move downward, so that the infusion cavity 515 pushes the connected branch vertical pipe 516 to move downward, pushing the dropper 518 connected to the bottom of the branch pipe rack 517 close to the test tube container 4 below. When the lifting guard plate The motor 54 connected to 51 drives the threaded rod 510 to rotate through the output shaft, so that the threaded rod 510 pushes the spline rod 511 to slide at the connection between the spline rod 511 and the gas cylinder 512 through the rotation, and the spline rod 511 pushes the connected piston 513 to slide along the gas cylinder 512, and the liquid in the gas cylinder 512 is unidirectionally transported to the infusion cavity 515 through the discharge pipe 514, and then transported to the connected branch vertical pipe 516 through the infusion cavity 515, and then flows into the dropper 518 through the branch vertical pipe 516 and is discharged into the test tube in the test tube container 4, and then the motor When the piston 513 approaches the motor 54, the rotation of the threaded rod 510 drives the peristaltic disc 55 to rotate, so that the peristaltic disc 55 rotates and squeezes the hose 57 through the connected peristaltic wheel 56, so that the air in the hose 57 moves and is discharged into the one-way port 520, and then enters the air cylinder 512 through the one-way port 520. As the air pressure in the hose 57 decreases, the hose 57 will suck the liquid in the input pipe 59 upward, and as the peristaltic disc 55 continues to rotate, the liquid in the hose 57 is sucked upward. The liquid is transported to the air cylinder 512 in one direction through the hose 57. The threaded rod 510 is used to rotate the piston 513 connected to the spline rod 511. At the same time, the peristaltic disk 55 and the peristaltic wheel 56 cooperate with the hose 57 to drain the liquid into the air cylinder 512, so as to realize automatic filling of the liquid in the air cylinder 512, simplify the air pressure structure and facilitate the flushing of the internal structure after use. The air is discharged from the infusion cavity 515 and then diverted through the branch vertical pipe 516, so as to perform aspiration and pipetting operations on multiple test tubes at the same time, thereby improving the work efficiency of aspiration and pipetting.

[0022] The maintenance mechanism 6 includes a liquid-passing end tube 61, the top end of which is fixedly connected to a lubricating tank 64, the interior of the air cylinder 512 is fixedly connected to a partition baffle 62, the side of the partition baffle 62 is fixedly connected to a side valve 66, the top surface of the air cylinder 512 is fixedly connected to a one-way valve 63, a lubricating cavity 67 is provided on the rear side of the partition baffle 62, and two lubricating tubes 65 are fixedly connected to the rear side of the air cylinder 512.

[0023] The lubricating tank 64 is connected to the liquid end pipe 61, the one-way valve 63 is connected to the air cylinder 512, the liquid end pipe 61 is fixedly connected to the air cylinder 512, a return spring is arranged between the piston 513 and the partition baffle 62, and the two ends of the return spring are respectively fixedly connected to the piston 513 and the partition baffle 62, the end of the root lubricating pipe 65 away from the air cylinder 512 is connected to the inside of the hydraulic rod 53, the air cylinder 512 and the root lubricating pipe 65 are connected to each other, the return spring is used to pressurize the piston 513, so that the piston 513 is forced to fit the inner wall of the air cylinder 512, thereby increasing the structural sealing between the air cylinder 512 and the piston 513, and the partition baffle 6 The air between the piston 513 and the piston 513 will be discharged into the lubricating chamber 67 through the side-pass valve 66 on the partition baffle 62. Since the lubricating liquid is discharged into the lubricating chamber 67 in one direction through the liquid-passing end tube 61 in the lubricating chamber 67, as the amount of air discharged into the lubricating chamber 67 by the side-pass valve 66 increases, the liquid in the lubricating chamber 67 is discharged into the lubricating tube 65 along with part of the air. The structure of the hydraulic rod 53 or the auxiliary sliding rod 519 is lubricated by the liquid in the lubricating tube 65, which can reduce the wear between the parts, reduce the normal use of the liquid transfer affected by the wear and damage of the hydraulic rod 53, and extend the service life of the whole equipment and reduce the trouble of manual maintenance.

[0024] The container sealing mechanism 7 includes a rubber rod 71, the bottom end of the rubber rod 71 is slidably connected to a pressure frame 72, the end of the pressure frame 72 away from the rubber rod 71 is fixedly connected to a short pressure rod 73, the outer surface of the short pressure rod 73 is slidably connected to a positioning piece 74, the bottom end of the short pressure rod 73 is fixedly connected to a sealing cover 75, a test liquid container 77 is provided at the bottom of the sealing cover 75, guide blocks 76 are provided on both sides of the top of the test liquid container 77, and a connecting terminal 78 is fixedly connected to the inner bottom end of the test liquid container 77.

[0025] A plug rod 79 is slidably connected inside the connecting end 78 , a connecting seal 710 is provided on the outer side of the rear end of the plug rod 79 , a drainage groove 711 is provided on the outer side of the front end of the plug rod 79 , and a top sheet 712 is provided on the front side of the plug rod 79 .

[0026] The positioning piece 74 is fixedly connected to the inner wall of the transfer end shell 2, and the sealing cover 75 is slidably connected to the transfer end shell 2. An elastic spring is arranged on the outer side of the short pressure rod 73, and the two ends of the elastic spring are respectively fixedly connected to the positioning piece 74 and the sealing cover 75. The top piece 712 is fixedly connected to the inner wall of the bottom end of the input tube 59. A connecting spring is arranged on the outer side of the plug rod 79, and the two ends of the connecting spring are respectively fixedly connected to the connecting end 78 and the plug rod 79. While the sealing cover 75 plays a positioning role on the test liquid container 77, the test liquid container 77 is squeezed downward by the sealing cover 75, so that the sealing cover 75 seals the inside of the test liquid container 77. To reduce the influence of the internal test liquid on the external environment, in addition, the connecting end 78 on the test liquid container 77 is connected to the bottom of the input tube 59, so that the top plate 712 in the input tube 59 squeezes the plug rod 79, and the plug rod 79 slides along the connection of the connecting end 78 after being compressed and compresses the connecting spring. The plug rod 79 moves so that the connecting seal 710 is no longer blocked by the connecting end 78, thereby realizing the connection between the input tube 59 and the inside of the test liquid container 77. Through the plug-in connection method, the disassembly flexibility of the test liquid container 77 can be improved, so as to facilitate the cleaning and use of the test liquid container 77, and it is more conducive to the complete discharge of the liquid in the test liquid container 77 through the input tube 59.

[0027] Working principle: When starting to work, the built-in hydraulic device controls the hydraulic rod 53 to contract, so that the bottom frame 52 connected to the hydraulic rod 53 moves downward, driving the connected lifting guard plate 51 to move downward. At this time, the air cylinder 512 connected to the lifting guard plate 51 moves downward together, and the drainage pipe 514 connected to the air cylinder 512 drives the infusion cavity 515 to move downward, so that the infusion cavity 515 pushes the connected branch vertical pipe 516 to move downward, pushing the dropper 518 connected to the bottom of the branch pipe rack 517 close to the test tube container 4 below. When the lifting guard plate 51 is connected The motor 54 drives the threaded rod 510 to rotate through the output shaft, so that the threaded rod 510 pushes the spline rod 511 to slide at the connection between the spline rod 511 and the gas cylinder 512 through the rotation, and the spline rod 511 pushes the connected piston 513 to slide along the gas cylinder 512, and the liquid in the gas cylinder 512 is unidirectionally transported to the infusion cavity 515 through the discharge pipe 514, and then transported to the connected branch vertical pipe 516 through the infusion cavity 515, and then flows into the dropper 518 through the branch vertical pipe 516 and is discharged into the test tube in the test tube container 4, and then the motor 54 is turned over. When the threaded rod 510 is rotated and the piston 513 approaches the direction of the motor 54, the threaded rod 510 rotates and drives the peristaltic disk 55 to rotate at the same time, so that the peristaltic disk 55 rotates and squeezes the hose 57 through the connected peristaltic wheel 56, so that the air in the hose 57 moves and is discharged into the one-way port 520, and then enters the air cylinder 512 through the one-way port 520. As the air pressure in the hose 57 decreases, the hose 57 will suck the liquid in the input pipe 59 upward, and as the peristaltic disk 55 continues to rotate, the liquid in the hose 57 passes through the one-way port 520. The liquid is transported to the air cylinder 512 in one direction through the hose 57, and the threaded rod 510 is used to rotate the piston 513 connected to the spline rod 511, and at the same time, the peristaltic disc 55 and the peristaltic wheel 56 cooperate with the hose 57 to drain the liquid into the air cylinder 512, so as to realize the automatic filling of the liquid in the air cylinder 512, simplify the air pressure structure to facilitate the flushing of the internal structure after use, and use the infusion cavity 515 to discharge the air and then divide it through the branch vertical pipe 516, so as to perform aspiration and transfer operations on multiple test tubes at the same time, thereby improving the work efficiency of aspiration and transfer; When the piston 513 slides through the partition baffle 62 via the connected spline rod 511, the space between the partition baffle 62 and the piston 513 is compressed, and the return spring between the partition baffle 62 and the piston 513 is squeezed, and the piston 513 is pressed by the return spring, so that the piston 513 is forced to fit the inner wall of the cylinder 512, thereby increasing the structural sealing between the cylinder 512 and the piston 513, and the air between the partition baffle 62 and the piston 513 is discharged to the lubricating chamber 67 through the side valve 66 on the partition baffle 62. Since the lubricating liquid is discharged into the lubricating chamber 67 in one direction through the liquid end tube 61, as the air discharged into the lubricating chamber 67 by the side valve 66 increases, the liquid in the lubricating chamber 67 is discharged into the lubricating tube 65 along with part of the air, and the structure of the hydraulic rod 53 or the auxiliary sliding rod 519 is lubricated by the liquid in the lubricating tube 65, which can reduce the wear between parts, reduce the normal use of the hydraulic rod 53 affected by the wear and damage of the hydraulic rod 53, and extend the service life of the whole equipment and reduce the trouble of manual maintenance; When the hydraulic rod 53 contracts, the hydraulic rod 53 moves downward to drive the rubber rod 71 to move downward. The pressure on the rubber rod 71 will push the connected pressure frame 72 to slide downward along the connection with the positioning piece 74 through the short pressure rod 73, so that the short pressure rod 73 pushes the sealing cover 75 downward to approach the top of the test liquid container 77 and stretch the spring. When the test liquid container 77 is fully fitted with the sealing cover 75, the sealing cover 75 plays a positioning role on the test liquid container 77, and at the same time, the sealing cover 75 squeezes the test liquid container 77 downward, so that the sealing cover 75 seals the inside of the test liquid container 77 to reduce the internal test liquid from being affected by the external In addition, by docking the connecting terminal 78 on the test liquid container 77 with the bottom of the input tube 59, the top sheet 712 in the input tube 59 squeezes the plug rod 79, and the plug rod 79 slides along the connection of the connecting terminal 78 after being compressed and compresses the connecting spring. The plug rod 79 moves so that the connecting seal 710 is no longer blocked by the connecting terminal 78, thereby realizing the connection between the input tube 59 and the inside of the test liquid container 77. By means of plug-in connection, the disassembly flexibility of the test liquid container 77 can be improved, so as to facilitate the cleaning and use of the test liquid container 77, and to facilitate the complete discharge of the liquid in the test liquid container 77 through the input tube 59.

[0028] The present invention provides a pipette for medical testing. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A pipette for medical testing, comprising a base (1), characterized in that: The top surface of the base (1) is fixedly connected to a transfer end housing (2), the front side surface of the transfer end housing (2) is fixedly connected to a control handle (3), a test tube vessel (4) is arranged below the control handle (3), a transfer mechanism (5) is arranged at the top of the interior of the transfer end housing (2), a maintenance mechanism (6) is arranged on the top of the transfer mechanism (5), and a container sealing mechanism (7) is arranged on the bottom surface of the transfer mechanism (5); The liquid transfer mechanism (5) comprises a lifting guard plate (51), the bottom surface of the lifting guard plate (51) is fixedly connected to a base frame (52), the bottom surface of the base frame (52) is fixedly connected to two hydraulic rods (53), the rear end of the lifting guard plate (51) is fixedly connected to a motor (54), the end of the output shaft of the motor (54) is fixedly connected to a threaded rod (510), the outer surface of the threaded rod (510) is fixedly connected to a peristaltic disk (55), the outer edge of the peristaltic disk (55) is rotatably connected to a peristaltic wheel (56), a hose (57) is tightly fitted to the outer side of the peristaltic wheel (56), one end of the hose (57) is fixedly connected to an output pipe (58), and the end of the hose (57) away from the output pipe (58) is fixedly connected to an input pipe (59), the end of the threaded rod (510) away from the motor (54) is threadedly connected to a spline rod (511), and the outer surface of the spline rod (511) is slidably connected to an air cylinder (512).

2. A medical test pipette according to claim 1, characterized in that: The interior of the gas cylinder (512) is slidably connected to a piston (513); the front end of the gas cylinder (512) is fixedly connected to a drainage pipe (514); the bottom end of the drainage pipe (514) is fixedly connected to an infusion chamber (515); the bottom surface of the infusion chamber (515) is fixedly connected to a plurality of branch vertical pipes (516); the bottom ends of the plurality of branch vertical pipes (516) are fixedly connected to a branch pipe rack (517); the bottom surface of the branch pipe rack (517) is fixedly connected to a dropper (518); the top surface of the branch pipe rack (517) is fixedly connected to four auxiliary sliding rods (519); and the bottom surface of the gas cylinder (512) is fixedly connected to a one-way port (520).

3. A medical test pipette according to claim 2, characterized in that: The lifting guard plate (51) is slidably connected to the inner wall of the transfer end housing (2), the hose (57) is fixedly connected to the lifting guard plate (51), the piston (513) is fixedly connected to the spline rod (511), the air cylinder (512) is fixedly connected to the lifting guard plate (51), and the auxiliary sliding rod (519) slides through the interior of the transfer end housing (2).

4. A medical test pipette according to claim 3, characterized in that: The maintenance mechanism (6) comprises a liquid-passing end tube (61), the top end of the liquid-passing end tube (61) is fixedly connected to a lubricating tank (64), the interior of the gas cylinder (512) is fixedly connected to a partition baffle (62), the side of the partition baffle (62) is fixedly connected to a side valve (66), the top surface of the gas cylinder (512) is fixedly connected to a one-way valve (63), the rear side of the partition baffle (62) is provided with a lubricating cavity (67), the rear side of the gas cylinder (512) is fixedly connected to two lubricating tubes (65), the interior of the one-way port (520) is provided with a one-way leaflet, and the interior of the liquid discharge tube (514) is also provided with a one-way leaflet.

5. A medical test pipette according to claim 4, characterized in that: The lubricating tank (64) is in communication with the liquid-passing end tube (61), the one-way valve (63) is in communication with the gas cylinder (512), the liquid-passing end tube (61) is fixedly connected to the gas cylinder (512), a return spring is provided between the piston (513) and the partition baffle (62), and two ends of the return spring are respectively fixedly connected to the piston (513) and the partition baffle (62), one end of the root lubricating tube (65) away from the gas cylinder (512) is in communication with the inside of the hydraulic rod (53), the gas cylinder (512) and the root lubricating tube (65) are in communication with each other, and one-way vanes are provided inside the liquid-passing end tube (61), the one-way valve (63) and the side-pass valve (66).

6. A medical test pipette according to claim 5, characterized in that: The container sealing mechanism (7) comprises a rubber rod (71), the bottom end of the rubber rod (71) is slidably connected to a pressure frame (72), one end of the pressure frame (72) away from the rubber rod (71) is fixedly connected to a short pressure rod (73), the outer surface of the short pressure rod (73) is slidably connected to a positioning piece (74), the bottom end of the short pressure rod (73) is fixedly connected to a sealing cover (75), a test liquid container (77) is provided at the bottom of the sealing cover (75), guide plug blocks (76) are provided on both sides of the top end of the test liquid container (77), and the inner bottom end of the test liquid container (77) is fixedly connected to a connecting terminal (78).

7. A medical test pipette according to claim 6, characterized in that: A plug rod (79) is slidably connected inside the connecting end (78), a connecting seal (710) is provided on the outer side of the rear end of the plug rod (79), a liquid drainage groove (711) is provided on the outer side of the front end of the plug rod (79), and a top sheet (712) is provided on the front side of the plug rod (79).

8. A medical test pipette according to claim 7, characterized in that: The positioning piece (74) is fixedly connected to the inner wall of the transfer end housing (2), the sealing cover (75) is slidably connected to the transfer end housing (2), an elastic spring is arranged on the outer side of the short pressure rod (73), and the two ends of the elastic spring are respectively fixedly connected to the positioning piece (74) and the sealing cover (75), the top piece (712) is fixedly connected to the inner wall of the bottom end of the input tube (59), and a connecting spring is arranged on the outer side of the plug rod (79), and the two ends of the connecting spring are respectively fixedly connected to the connecting end (78) and the plug rod (79).

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